Polyurethane facade stucco: how to assemble a decor set for windows, corners, plinth, and cornice

The facade is the face of the house. It is by the facade that a passerby, neighbor, or guest reads the character of the home even before crossing the threshold. One house says: "I was built and painted." Another says: "I was designed." The difference between them is not always in the budget. Most often, it is in the details. In whether the facade has horizontal lines that maintain proportions. Whether the windows are framed so that the gaze lingers. Whether the corners are finished so that the house looks cohesive, not accidental.

Polyurethane facade stucco molding is a system of ready-made architectural details that turn a plaster box into a well-thought-out image. Window casings and frames, pediments, rustication at the corners, a base cornice, an interfloor belt, decor above the entrance — all these are elements of a single set that can and should be selected in one style.

This article is about how to read a facade as an architectural text and how to assemble a kit polyurethane facade decoration, which will work as a system, not as a set of randomly chosen details.

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What is polyurethane facade stucco molding: material, logic, application

Polyurethane moldings for the facade — these are exterior decorative elements cast from foamed two-component polyurethane. Unlike traditional plaster, polyurethane is not afraid of moisture, frost, or ultraviolet light. It does not absorb water, does not crack when freezing, and does not crumble upon impact. This makes it the optimal material specifically for exterior use.

Polyurethane for the facade is not a compromise. It is a conscious technological choice. Plaster stucco on the facade requires a protective coating, regular maintenance, and is vulnerable to temperature changes. Polyurethane stucco is applied to a clean facade, painted with facade paint, and maintains its appearance without special care for years.

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Physical Characteristics

• Density: 200–350 kg/m³ — several times lighter than plaster (1,200–1,400 kg/m³)

• Water absorption: less than 0.5% — practically waterproof

• Operating temperature range: from −50°C to +70°C

• For painting: any acrylic or silicate-based facade paint

• Fixing: polyurethane adhesive + dowels for heavy elements

Lightness is not just about ease of installation. It is fundamentally important for the facade: heavy plaster elements put stress on the insulation and plaster layer. Polyurethane weighs six to seven times less — the load on the facade system is minimal.

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Polyurethane molding NPU-435.1R

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Polyurethane molding NPU-435.1L

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What problems does facade stucco molding solve: seven functions

Before putting together a set, it's important to answer the question: why exactly does this house need stucco molding? The task may have different answers.

Function 1. Visually elevate the house in price category

A standard plastered facade without divisions is the "economy segment," even if the house is built from good brick. Horizontal lines of the interfloor belt, framed windows, and decorated corners — and the same house is perceived as "a class higher."

Function 2. Emphasize the architectural concept

If the house was designed in a classical or neoclassical style, stucco molding is not just decoration. It is part of the architectural system: without decorative horizontals and accents on the windows, the classical style is not realized, it is only "conceived."

Function 3. Design windows as the main elements of the facade

A window is the most complex element of the facade in terms of perception: glass, frame, slopes. The architectural framing of the window "assembles" all this into a single whole. A house with framed windows looks like a house where details were thought about.

Function 4. Create a horizontal rhythm of the facade

The interfloor belt divides the facade into floors the way it should be divided architecturally. The base cornice completes the lower zone. The crowning cornice completes the upper one. Three horizontal lines — and the facade gets "tiers," proportions, rhythm.

Function 5. Strengthen corner zones

Corners of a house without decor are a weak point of the facade. They look like just a "connection of two planes." Rustications or corner elements along the vertical of the corners create a visual "frame": the house looks stricter and more cohesive.

Function 6. Create an accent on the entrance group

The entrance to the house is an architectural accent. Brackets, a cornice above the door, side pilasters, or decorative elements around the perimeter of the doorway — all of this highlights the entrance from the general plane of the facade.

Function 7. Unite the facade into a single image

When all elements are of the same style, from the same collection, in the same tint — the facade becomes whole. This is the main function of a comprehensive approach to facade stucco molding.

Which elements are included in the facade stucco molding kit: a complete breakdown

Polyurethane Items for the facade — it is not one type of product, but a whole system. Let's break down each element.

Window trims and casings

Side vertical elements that frame the window opening on both sides. They create a "frame" around the window — visually highlight it from the wall plane, add shadow and relief. Trim width: 60–120 mm depending on the scale of the house.

Sandriks (window hoods)

Decorative horizontal element above a window: imitates an architectural canopy protecting the window from rain. In classical architecture, it is a mandatory element of window framing. The sandrik can be straight (rectangular with a profile), triangular (with a gable top), or bow-shaped (with a semicircular top).

Window sill belts

Horizontal profile under the window sill or under the lower edge of the window opening. Creates a "shelf" under the window, completes the lower part of the window framing, and connects windows horizontally if they are on the same level.

Keystones

Decorative element at the center of the upper arch or lintel of a window opening — the "lock." In classical architecture, the keystone fixes the arched lintel. On a facade without arches, it creates the illusion of an architectural lock, enhancing the accent on the upper part of the window.

Rustication

Polyurethane trim in the form of horizontal or vertical strips imitating masonry of large blocks. Rustication at the corners is a classic technique for reinforcing corner zones. Rustication across the entire facade is the style of a "rusticated plinth" or "rusticated ground floor" (lower floor in rough stone masonry, upper floor in smooth plaster).

Interfloor belt

Horizontal profile along the entire perimeter of the house at the level of the interfloor ceiling. Visually divides the facade into floors. This is one of the most "effective" elements in terms of cost-benefit ratio: one horizontal line around the perimeter of the house dramatically changes its proportions.

Plinth cornice

Horizontal profile along the boundary of the plinth and the main volume of the house. Completes the plinth area and visually separates it from the walls. Without a plinth cornice, the boundary of the plinth looks random — "the plaster simply transitions to another color." With a cornice, it becomes an architectural boundary.

Crowning cornice

Horizontal profile along the top edge of the wall, under the roof. Completes the facade. In classical architecture, the crowning cornice is a mandatory element; it "closes" the wall from above and creates a shadow separating the wall from the roof. In modern facades, it can be simplified to a thin profile.

Brackets

Polyurethane brackets — cantilevered decorative elements that imitate supporting structures. Used under the cornice (creating the effect of "brackets holding the cornice"), on the sides of the entrance group, under the balcony, under the pediment above the window. Add volume, shadow, and a sense of architectural depth.

Decorative appliqués

Relief Decoration Elements — rosettes, medallions, cartouches, ornamental inserts. Used as point accents on the piers between windows, above the entrance, in the pediment area, above the pediment. Add decorativeness without overloading the facade.

How to choose stucco molding for windows on the facade: window set step by step

A window on the facade is the main "unit" of the facade composition. It is the windows that create the rhythm, proportions, and character of the facade. And it is the window framing that is the first thing tackled when decorating.

What is included in the window set

A complete window framing set includes:

1. Side architraves — two for each window, vertically along the opening

2. Upper horizontal architrave or pediment — above the window

3. Window sill profile — under the window sill

4. Keystone — at the top (optional, for classic style)

5. Corner elements — for joining architraves (if not cut at 45°)

How to choose the size of the architrave

The width of the architrave is proportional to the window size and the scale of the house:

• Standard size window (1.2×1.5 m) on a one-story house: architrave 60–80 mm

• Same window on a two-story house with high ceilings: 80–100 mm

• Large window (1.5×2 m) on a cottage with high ceilings: 100–130 mm

Important: all windows on the same floor — architraves of the same width. Windows on different floors may have different architrave widths if they are of different sizes.

Pediment: straight, triangular, or arched

Straight pediment — for modern classic, neoclassical style. Strict horizontal shape.

Triangular (pediment) sandrik — for classicism and Empire style. Resembles a temple pediment above each window. A powerful architectural accent.

Bow (arched) sandrik — for Baroque and Romantic Classicism. Creates an interesting contrast of shapes above a rectangular window.

Rule: all windows on one facade must have sandriks of the same type. Mixing straight and triangular sandriks on one facade is a stylistic mistake.

How to design house corners: rustication, corner elements, vertical rhythm

Corners are the "backbone" of the facade composition. They hold the shape of the house and determine how clearly the building's volume is perceived.

Rustication on corners: two approaches

Corner rustication consists of horizontal strips polyurethane molding, which wrap around the corner of the house on both sides at an equal vertical spacing (usually 150–250 mm). Creates the effect of masonry made of large blocks at the corner — "rusticated ashlar masonry."

This technique was widely used in classical architecture of the 17th–19th centuries: the lower tier of the house (basement or entire first floor) with rustication on the corners, the upper tier smooth.

Vertical corner overlays — elements forming a vertical "strip" along the corner edge. Visually emphasize the vertical, making the corner more distinct.

Pilasters at the corners

In a classical facade, pilasters at the corners of the building create the effect of "the building resting on columns." A pilaster is a flat imitation of a column: a base at the bottom, a shaft vertically, and a capital at the top. On a two-story house, the pilaster runs across both floors — or only on the first.

Pilasters at the corners + a crowning cornice above them = a complete classical facade that reads as an architectural work.

Rhythm of corner rustication and the interfloor belt

A very important detail: the spacing of rustication at the corners must align with the horizontal lines of the facade — the interfloor belt and the base cornice. If the belt passes at a level where a rustication should be, the rustication is replaced by the belt at that point. Otherwise, the lines will "compete."

How to choose base and interfloor decor: horizontal lines of the facade

Horizontal lines are the architectural grammar of the facade. Their correct placement turns volume into a system.

Base cornice: the lower boundary

The base zone of the facade — from the blind area to the floor level of the first floor, typically 40–80 cm. The base cornice crowns this zone and creates a horizontal divider between the base (which may be of a different color or texture) and the main wall.

Width of the base cornice: proportional to the height of the base. With a base of 60 cm — cornice 80–120 mm. With a base of 90 cm — 120–180 mm. The cornice should be "readable" from the street, creating a noticeable horizontal shadow.

Interfloor belt: proportion divider

The interfloor belt is a horizontal profile at the level of the interfloor ceiling. Its height on the facade: the ceiling level of the first floor or the window sill level of the second floor. The choice depends on the architectural solution.

Width of the interfloor belt: 80–150 mm for a two-story house. It should be noticeable but not massive. If the belt is too thin, it gets lost on the facade from a distance. If too wide, it "cuts" the facade in half.

Crowning cornice: top finish

The crowning cornice along the top edge of the wall is the boundary between the wall and the roof. It creates a shadow that separates the top edge of the wall and visually "closes" the building volume from above. Without it, the facade looks "unfinished" — the wall seems simply cut off.

For a country house with a gable roof, the crowning cornice runs along the wall level under the gable. For a flat roof, it runs along the perimeter of the entire building.

Entrance group decor: an architectural accent that cannot be missed

The entrance group is the only place on the facade where the level of detail should be maximum. This is where a person approaches the house closely, this is where they examine the details.

Cornice above the entrance door

Polyurethane brackets Under the horizontal cornice above the entrance is a classic and very effective technique. Brackets create the feeling that the cornice is "supported" by supports. At least two brackets (at the edges of the cornice), in the classic version — three or five.

Height of the cornice above the entrance: typically at the level of the top of the door opening + 200–300 mm. Brackets are installed between the door opening and the cornice.

Pilasters on the sides of the entrance opening

Pilasters on the sides of the entrance door create an architectural portal: the entrance is highlighted from the general plane of the facade as an independent architectural zone. Base + pilaster shaft + capital + horizontal cornice above them = a full-fledged entrance portal.

Keystone above the entrance

Above the entrance door with an arched or segmental top — a keystone. In the case of a rectangular opening — a decorative overlay in the center of the horizontal cornice above the entrance: a cartouche, medallion, or ornamental element.

Decorative overlays on the sides of the entrance

Relief Decoration Elements on the piers on the sides of the entrance door: decorative rosettes, shields, cartouches. They create a symmetrical accent zone for the entrance.

How to choose the style of facade stucco: from classics to modern cottage

Stucco is not just 'decoration in general.' It is a stylistic choice. And it must match the architecture of the house.

Classic and neoclassical style

Full set of elements: architraves + sandriks (triangular or straight) + keystones + interfloor belt + plinth cornice + crowning cornice + brackets + pilasters at corners or entrance. sculpted appliqués — rosettes, cartouches — on the piers. Tinting: white, cream, light gray on a darker facade.

Modern classic

Simplified set: straight architraves without a sandrik (or a straight sandrik) + interfloor belt + crowning cornice. Minimum ornament. Clear horizontal lines. Entrance group decor — brackets + cornice without brackets. Tinting: white on a beige or gray facade.

Country house and cottage

Moderate set: window frames (architraves without a sandrik or with a simple straight sandrik) + base cornice + rustication at the corners. Brackets under the roof overhang. The facade looks "finished" but not overloaded. Tinting: warm shades coordinated with the roof color.

House in the "Italian villa" or "Mediterranean" style

Arched sandriks or bow-shaped window frames. Developed cornices with brackets. Rustication on the lower floor. Ornamental overlays above windows. Warm tinting: terracotta, ochre, ivory.

Why polyurethane is convenient for facades: five technical advantages

The question of material for facade stucco is not only aesthetic. It is practical: the facade operates under alternating loads — frost/thaw, rain/sun, wind/humidity. The material must handle this.

1. Water resistance. Polyurethane practically does not absorb water. This is critical for the facade: gypsum that has absorbed moisture is destroyed when freezing — polyurethane is not.

2. Frost resistance. Operating range down to −50°C without loss of properties. For the Russian climate — fundamentally important.

3. Lightness. 6–7 times lighter than gypsum. Does not load the insulation, plaster layer, or load-bearing structures. Large cornices and brackets are installed without base reinforcement.

4. Suitable for any painting. Acrylic, silicate, silicone facade paints — all are suitable. After painting, the polyurethane element is visually indistinguishable from plastered one.

5. Easy installation. The lightweight element is glued with polyurethane adhesive and fixed with dowels (for large elements). Installation does not require special tools or construction skills.

Mistakes when choosing facade stucco molding: what goes wrong

Most unsuccessful facades are the result of the same mistake: elements were chosen one by one, without a scheme of the entire facade.

They buy one type of element, forgetting about the others. Bought beautiful sandriks above the windows — but did not select platbands, belts, and corner elements. As a result, the windows "float" in an empty wall.

They mix styles. Baroque brackets with rustication in a strict classical style. Triangular sandriks next to arched ones. Each element is beautiful on its own — together they look like an "architectural market."

They take too small decor for a large house. A platband 50 mm wide on a two-story house 8 m high — it is almost invisible from the street. The scale of facade decor should match the scale of the building.

Conversely — they overload a small house with massive details. A wide crowning cornice 200 mm on a one-story house 3 m high — the cornice occupies 6% of the wall height. This is too much.

They forget about the plinth. They decorate windows, cornice, entrance — and leave the plinth bare. Without a plinth cornice, the facade has no lower base — it "floats."

They do not consider the color of the facade. White decor on a light gray facade — readable. White decor on a white facade — disappears. Either tone-on-tone (delicate) or contrast (expressive) is needed. Gray or cream decor on a dark facade — very effective.

Don't count the number of elements in advance. "I'll order as many as needed later" is a mistake. Different batches may vary slightly in texture shade. It's better to buy everything at once with a 10–15% margin.

Don't plan joint installation. On a long wall, a horizontal belt will have several joints. If joints are not in corners or under framing elements, they are visible. Joint placement is planned in advance.

Buy decor before choosing the facade color. Later, it turns out the planned color doesn't provide the desired contrast with the decor. First — color scheme, then — decor.

Ignore the entrance group. Decorate the entire facade but leave the entrance without accent decor. As a result, the architecturally most important point of the facade becomes the "quietest."

How to create a facade kit diagram: a practical algorithm

Before buying polyurethane facade stucco, create a diagram.

Step 1. Sketch the facade to scale. Mark all windows, doors, corners, the plinth level, the interfloor ceiling level, and the top edge level of the walls.

Step 2. Place horizontal lines. Plinth cornice, interfloor belt (if the house is two-story), crowning cornice. Three lines — a ready horizontal system.

Step 3. Decorate the windows. On the diagram, draw window frames: side architraves, top sandrik or architrave, window sill profile. Ensure the window sill profile doesn't "conflict" with horizontal belts.

Step 4. Decorate the corners. Decide: rustication or pilasters. Add them to the diagram. Check how rustication relates to horizontal belts.

Step 5. Design the entrance group. Brackets, cornice, pilasters or overlays on the front door.

Step 6. Add accent overlays. Medallions, rosettes on the piers — optional. Do not overload.

Step 7. Count the number of elements. Each type — with a margin of 10–15%.

FAQ: answers to the main questions about facade stucco

What is included in polyurethane facade stucco?
Window trims and frames, sandriks, window sill profiles, keystones, rustication, interfloor belt, base cornice, crowning cornice, Brackets, Decorative Inserts. All elements made of polyurethane products.

What elements are needed for decorating the house facade?
Minimum set: window frames + interfloor belt (for a two-story house) + base cornice + crowning cornice. Extended: + rustication on corners + brackets + entrance decor.

How does polyurethane facade stucco differ from plaster?
Polyurethane: lightweight, waterproof, frost-resistant, requires no special care. Plaster: heavy, absorbs moisture, cracks when freezing, requires a protective coating.

Is polyurethane molding suitable for exterior decoration?
Yes, this is its main application. It is specially designed for facade use: resistant to moisture, UV radiation, and temperature fluctuations from -50°C to +70°C.

How to choose window decor for the facade?
The width of the trim is proportional to the window and the scale of the house (60–130 mm). The type of pediment is consistent with the facade style. All windows on the same floor have the same set of framing.

Are rustications needed for the corners of the house?
For classical and neoclassical facades, they are desirable: they visually 'hold' the corners. For a modern house, you can limit yourself to vertical corner profiles or pilasters.

How to choose the cornice and interfloor belt?
The width of the base cornice is 80–180 mm depending on the height of the base. The interfloor belt is 80–150 mm. All horizontal profiles are from polyurethane molding the same series.

Can you paint polyurethane facade stucco molding?
Yes. Any facade paint: acrylic, silicate, silicone. Before painting — primer for complex surfaces. After painting, the element is visually indistinguishable from plaster.

How to avoid overloading the facade with decor?
Follow the principle: one main accent (windows or entrance) + supporting horizontal lines + corner elements. Decorative overlays — only on significant piers, not on every free plane.

Where to buy polyurethane facade stucco molding?
In the STAVROS catalog: Full range of polyurethane products — Trim, Brackets, applique. Delivery across Russia.

STAVROS: a facade kit that works as a system

The facade is architecture on the outside. It is always visible: morning, evening, winter, summer. It is the first thing you see when returning home, and the last when you leave. And that is why the facade should be treated with the same seriousness as the interior.

Polyurethane stucco molding for the facade is an affordable, practical, and durable way to give your home the architectural character it deserves. A properly selected kit — trims, cornice, interfloor belt, corner elements, entrance decor — turns a box into an image.

STAVROS offers full range of polyurethane facade decor: profile Trim, Brackets, stucco overlays and decorative elements — made of high-quality two-component polyurethane from European production, in a single catalog, with delivery across Russia.

STAVROS — because the right facade starts with the right kit.